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Fan
Usually the fan is mounted on the same shaft with a leading- tion pump and is driven from the crankshaft through a belt drive. In the drive can be enabled electromagnetic clutch or fluid coupling. Fluid coupling provide provides a smooth transmission of rotation from the crankshaft the fan. The fan speed depends on Ko the amount of the oil supplied to the fluid coupling from the system lubricant, which is adjusted by moving a spool included switch. In modern cars increasingly used stand-alone fan drive special from electro- engine. This fan automatically turns on when reaching a coolant temperature of 75°— 85°C. The thermostat automatically maintains heat mode engine, directing the flow of the liquid in the small or the large cooling circuit. It was placed in a Polo STI inlet or fluid outlet of shirts cooling of cylinder heads. Thermostats can be liquid or solid filler. Inside the corrugated brass cylinder poured liquid, boiling point 70°-75°C. The cylinder thermostat with solid filler — microcrystalline wax (petroleum wax) with a melting point of 70°-83°C. When the engine is not warmed up, the thermostatic valve is closed and the fluid circulates bypassing the radiator, a small con- round of cooling: cavity cooling — thermostat — PE- rauschnot hose — water pump — cavity cooling that accelerates engine warm-up. At least- greva coolant filler thermostat on- grivitsa and expands and eventually opens valve. The liquid starts to circulate through large circle cooling: water pump — cavity cooling — thermostat — the upper radiator tank — ser- Davina — lower radiator tank — pump — cavity cooling. With decreasing coolant temperature the corrugated surface of the cylinder thermostat compresses- Xia and the valve closes. Thermostats with solid fill- Telem there is an additional spring providing the return valves to the closed position while reducing coolant temperature and corresponding reducing the volume of the filler bulb of thermostat. Sensors instrumentation centre. - ly in the cylinder head, the radiator top tank and Rubach- ke cooling of the upper pipe. Signal and signs lights on the dashboard are used for monitoring tempera- tours of the coolant in the system. |
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